About

jsonzen exists because every popular JSON formatter on the web POSTs your input to a server. For most JSON that's fine; for API responses with session tokens, PII, or anything you wouldn't want logged, it's not.

All nine tools here run in your browser. There is no backend. There is no database. There is no per-user data being collected. The codebase is open source.

What you can do here

• Format, validate, minify, escape, and repair JSON
• Compare two JSON values to see exactly what changed
• Convert to/from CSV, YAML, and XML

The privacy promise

See the privacy policy for specifics. The short version: we set no cookies, we collect no IP addresses, and the JSON you paste never leaves the page.